Description

In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Sanitize payload size to prevent member overflow In qla27xx_copy_fpin_pkt() and qla27xx_copy_multiple_pkt(), the frame_size reported by firmware is used to calculate the copy length into item->iocb. However, the iocb member is defined as a fixed-size 64-byte array within struct purex_item. If the reported frame_size exceeds 64 bytes, subsequent memcpy calls will overflow the iocb member boundary. While extra memory might be allocated, this cross-member write is unsafe and triggers warnings under CONFIG_FORTIFY_SOURCE. Fix this by capping total_bytes to the size of the iocb member (64 bytes) before allocation and copying. This ensures all copies remain within the bounds of the destination structure member.

References 4

• git.kernel.org https://git.kernel.org/stable/c/1922468a4a80424e5a69f7ba50adcee37f4722e9
• git.kernel.org https://git.kernel.org/stable/c/19bc5f2a6962dfaa0e32d0e0bc2271993d85d414
• git.kernel.org https://git.kernel.org/stable/c/408bfa8d70f79ac696cec1bdbdfb3bf43a02e6d0
• git.kernel.org https://git.kernel.org/stable/c/aa14451fa5d5f2de919384c637e2a8c604e1a1fe

Remediation